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Samsung SMH9207ST microwave stopped working has on power checked outlet and breaker and changed microwave fuse still on power

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9085 Answers

SOURCE: LG Microwave LMVM2055ST Just stopped working!

We have the service manual for this model and have uploaded it to our site here to help you.

You will need the
free Acrobat Reader to view or print it in case you don't have it.

It may be the fuse, which is usually located behind the grille or on the floor of the oven behind the control panel or between the door switches.


If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

When checking TCOs or thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.

If the cavity thermostat needs to be checked or replaced you'll need to pull the oven from the wall.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

To order Goldstar / L.G. parts, visit Vance Baldwin Electronics. You'll probably have to call them.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Dec 13, 2008

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  • 1214 Answers

SOURCE: dead microwave oven

If you have a multimeter and are comfortable with testing "live" circuits, measure to see if there is voltage from chassis ground, to both ends of the fuse, or to each wire connection on the fuse holder.If no voltage, then the problem is very likely the wall plug does not have power (could be a wire broke inside the wall box.).

If there is power, chances are there is a controller board problem. You should have seen a wiring diagram/schematic when you disassembled to replace the fuse.

Posted on Jan 20, 2009

ronaldo_ross
  • 1056 Answers

SOURCE: Microwave stopped working

All you have to do is locate the fuse, and then check for continuity, or measure ac current on both side of the fuse. If ther is 120vac on one side and none on the other side then it is blown.

Posted on Aug 12, 2009

  • 45 Answers

SOURCE: No power to microwave?

The cord may be defective either 1) at the plug end, 2) internally inside your microwave, or 3) inside the cord itself.
Otherwise there may be an internal fuse that has blown due to a surge, etc.
It is not so difficult to check. Open the rear cover of the unit, and check for an in-line fuse. If there isn't one, or if it's okay, then use a tester to confirm if power is getting to the unit by placing the probes on on both positive and negative contacts. If you don't have a tester, you can use a basic unit (a light with 2 wires/probes) that Home Depot has in the electrical department for a couple of bucks.

Posted on Sep 07, 2009

heatman101
  • 43501 Answers

SOURCE: Samsung Microwave SMH9207ST lost power

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 ';
;'
;'';

;'

Posted on Apr 22, 2011

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Hello

Check the Power Cord

Verify that the power cord is properly connected the outlet; the plug might have been removed to make way for another appliance. Do not connect the microwave to an outlet via an extension cord or plug adapter; the oven must be directly connected to an outlet.
Switch the Outlet on

Turn the outlet on, if possible, using the switch on the wall behind the counter or on the plug itself. Some microwaves have a separate power switch that must be in the correct position before you can begin cooking.
Reset the Oven

Unplug the oven, wait a few seconds and reconnect the power. A power surge could have temporarily rendered the oven inoperable. The oven should start up as normal when you connect the plug to the outlet.
Check the Fuses and Breakers

See that the fuse or breaker protecting the oven's circuit is still active. Replace the fuse if it has blown, or reset the breaker to restore power to the oven. Stop using the microwave if it repeatedly blows fuses or trips breakers.

Oct 04, 2011 | Microwave Ovens

1 Answer

Samsung Microwave SMH9207ST lost power after cooking a meal, the power outlet works fine.


Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 ';
;'
;'';

;'

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If your microwave oven doesn't seem to work at all, check these: Fuses Usually, when your microwave oven doesn't work it all, the internal fuse (thermal fuse) is blown. This fuse protects both you and the oven. When it blows, you need to have a qualified appliance repair technician replace it. Door switch If the fuse isn't the problem, check the door hooks and the door-release button. When these are broken, the door switch doesn't activate, so the oven can't work.
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Check power outlet and breaker , recock breaker .
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